Regenerative metal-heating furnace.



Patented Sept. 19, 1911.

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J. R. GEORGE.

REGENERATIVE METAL HEATING FURNAGE.

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APPLICATION FILED 111111.18. 1907.

Witnesses Inventor deforme RG orge.

*3e ff J. R. GEORGE. RBGBNBRATWB METAL HEATING PURNAGE.

' 'APPLICATION FILED MARIS, 1907.

Patented Sept. 19, 1911.

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UNITED STATES. PATENT OFFICE.

JEROME R. GEORGE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO MORGAN CON- STRUCTION COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MAS- SACHUSETTS.

REGENERATIVE METAL-HEATING `FURNACE.

Specification. of Letters Patent.

Patented Sept.19, 1911 Application led March 18, 1907. Serial No. 362,840.

companied by drawlngs forming a part ofl the same, in which- Figure 1 represents a central vertical sectional view of a regenerative furnace embodying my invention, the section being shown on the plane of the broken line 1-1, Fig. 2. Fig. 2 is a horizontal sectional view on the plane of the broken line 2 2, Fig. 1. Fig. 3 is a transverse vertical sectional view on the plane of the broken line 3--3, Fig. 1. Fig. 4: represents the same horizontal sectional view as Fig. 2, but with the valves 21 and 25 reversed, and Fig. `5 is a vertical sectional view on line 5-5, Fig. 2.

Similar reference letters and figures refer to similar parts in the different views.

My present invention relates to that class of regenerative furnaces in which duplicate regenerative passages or flues are provided which are alternatelyused for the admission of air to the fuel charge as the lat-ter is admitted to the heating chamber, and for the passage of the products of combustion to the stack, and it has for its objectto providea simple and efficient means for controlling the inlets to said duplicate passages or fines, whereby each passage may be converted from an air admission passage to the heating chamber into an exhaust passage for the products of combustion from the heating chamber, and vice versa, and my invention consists in the construction and arrangement of parts as hereinafter described and pointed out in the annexed claim.

Referring to the accom anying drawings 1 denotes a metal heating urnace containing aheating chamber 2, adapted for heating a continuous row of billets or metal bars 3, which are progressively advanced through the heating chamber upon a longitudinal track 4, said bars being received through an admission openin 5 at one end of the chamber, and removec? through a deliver opening 6 at the opposite end of the c iamber.

At the delivery end of the chamber are provided -a series of vertical as ports 7 for the admission of fuel gas received from horizontal gas conduits 8. The gas ports 'i' communicate at ,their lower ends with a transverse chamber 9 into which gas is delivered through the conduits S.

At the rear of the transverse chamber t) is a similar transverse ehalnbeiklt) communicating on one side with a longitudinal air passage 11, and on the opposite side with a series of vertical air ports 12. which alternate with the series of vertical gas ports 7. Through the ports 7 and 12 cnrrents of air and gas are admitted to the delivery end of the heating chamber supplying gaseous fuel. Upon opposite sides of the central longitudinal air passage 11 aro longitudinal passages or lilies 18 and lt communicating at one end b'v inlet openings 15 and 16 'with the exhaust end of the heating chamber. 'lhe passages 13 and 1l connnunicate at their opposite ends with the longitudinal passages 1T and 18 which pass through the end wall of the furnace and are turned inwardly at l'ight angles, and are provided with outlet openings 1t) and 2() oi. the upper sides of the passages. Between the inturned ends of the passages 17 and 18 is a passage 21 leading to the stack, having an inlet openingr '.22 in its upper surface. and between the outletv openings 19 and 2t). The central longitudinal air passagellisprovidedat its upper side with all inlet opening 23 between the openings 15 and 1G. A sliding D-valve 2t is provided, capable ot' covering the central air inlet opening 23 and one of the tine, openings 15 and lt. A similar D-valve :25 is provided capable of *simultaneously cov ering the central opening 22 leading to the stack and one of the flue. openings 1i' aml 18. The D-valves 21; and 25 are. connected by links 2G and 27 with the opposite ends of an oscillating lever 28, pivoted at its center at 29 and operatively connected with a piston equipped cylinder 3() for either steam or water under pressure. i The flue passages 13 and 14, and 17 and 18 are provided with a checker work of brick, as represented by the broken lines 31, Fig. 1, after the usual manner of regenerative furnaces. The Dvalves 24 and 25 are duplicates in construction and they comprise curved or arched plates, as shown at 32, which serve to connect the two openings spanned by the valve.

In Fig. 2 of the drawings the valve 2i is represented as connecting t-he opening 15 with the central air opening 23, thereby connecting the central longitudinal air passage 11 With the regenerative flue passages 13 and 17, and the valve 25 is represented as uniting the central opening 22 leading to the stack, and the iiue opening 20. In the position of the valves 24, and 25 as shown in Fig. 2, t-he lliuc passage 1G is left open to receive thev .products of combustion from the heating eli-amber, and the line passage 19 is leftopen to receive air which is supplied under pressure by any1 convenient apparatus usually employed for the purpose, not shown. In the position of the valves 24e and 25, as represented, the products of combustion pass from the heating chamber 2 through the regenerative flue passages 14 and 1S through openings 20 and 22 beneath the valve 25 into the passage 21 leading to the stack. The charge of air entering through the opening 19 passes through the passages 17 and 13, and through the openings 15 and 23 beneath the valve 2a into the central longitudinal air passage 11, from which it is delivered to the transverse chamber 10, and passes'thence upwardly through the vertical air ports 12, mingling with the gas received through the gas ports 7 and enteringl the fuel inletend of the heating chamber'. By oscillating the lever 2S the valves 2-1 and 25 are shifted into the position shown in Fig. -'l-, causing the products of combustion to pass through the opening 15, flue passages 12% and 1T, and beneath the valve 25 into the passage 21 to the stach', at the same time that air is received through the openingr 20, flue passages 15 and 14, and beneath the valve 21 into the central air passage l1 leading to the fuel inlet end of the furnace. In the operation of the furnace the valves 24 and 25 are periodically shifted, causing the fine passages to be alternately employed as eX- haust passages for the products of'coinbus-V tion, and as an air admission passage to the fuel ports. By occasionally shifting the valves the deposits of tar or soot Which would clog the flue passages when continuously used as exhaust flues, become cleared by the passage of air.

By my present improvement I greatly simplify the construction of furnaces of this class and I enable the operator to shift the regenerative fines and alternately connect them with the passageto the stack and the air passage to the fuel ports by the use of a single. pair of valves both located at the same end of the furnace, and in convenient position to be simultaneously operated by a single actuating mechanism.

I claim,

In a regenerative furnace, the combination with a heating chamber and a stack, a port for the admission of fuel and a port for the admission of air to combine With the fuel as admitted to said chamber, of a single central air passage beneath said chamber communicating With said air port, longitudinal flucs on either side of said central air passage communicating therewith, each Hue having an inlet opening from the exhaust end of said chamber, a longitudinal 1passage on the outside of each fine communicating with the opposite end of said flue from said inlet opening, and

said passage having openings at the eX- haust end of the furnace arranged to communicate with said stack, Valves arranged to connect the inletopening in one of said tlues with-said air passage and at the same time connect the opening in the opposite longitudinal passage With the stack, said" valves arranged at the same end of the heating chamber, and means for operating said valves sin'iultaneously.

Dated this 15th day of March, 1907.

AJEROME R. GEORGE. Witnesses liaxnnorn CoMBnnAoI-I, Burns B. FoWLER. 

